Units[Standard][log] - general logarithmic function in the Standard Units environment

Units[Standard][log10] - common logarithmic function in the Standard Units environment

Calling Sequence

ln(expr)

log(expr)

log10(expr)

lob[b](expr)

logb&ApplyFunction;expr

Parameters

expr

-

algebraic expression

b

-

algebraic expression, the base of the logarithm

Description

•

In the Standard Units environment, the arguments for the logarithmic functions can be unit-free, or multiplied by a unit that is energy-equivalent to a rational power of the dimension length(base)/length. Examples of such units are watt/watt(base) (power ratio) or voltage/voltage(base) (voltage ratio).

•

For non-unit-free expressions, the result is expressed in the dimension of logarithmic gain. The unit of the object returned is the neper by default.